Ultrasonic cleaner



FIG. 1 is a perspective view taken from the top, front and right side of an ultrasonic cleaner showing our new design;

FIG. 2 is a left side elevational view thereof; and

FIG. 3 is a rear elevational view thereof.

The fragmentary broken line showing of an electric cord in FIGS. 2 and 3 are for purposes of illustration only. 

The ornamental design for an ultrasonic cleaner, substantially as shown. 